Newcastle winger Anthony Gordon was the matchwinner as England defeated Portugal in Sunday's U21 Euros quarterfinal.
Gordon struck the only goal of the game as England won 1-0.
"We have to give Portugal a lot of credit," England U21 coach Lee Carsley later said. "They pressed us really well, they were aggressive with their positioning.
"We couldn't control it. It wasn't as if we were on battery save mode, Portugal were good. It should give the players great confidence knowing that they can beat potentially the favourites."
An ankle injury to Aston Villa midfielder Ramsey has him a doubt for Wednesday's semi-final.
"We'll assess Jacob tomorrow. We won't be taking any chances," Carsley said.
"If there's a chance of a player with injections, they won't be doing that. It's still development football. Jacob's in good hands. It's hard to tell. He's got a lot of numbness in his foot and ankle."